During December 2024, Tiger Li focused on backend reliability for the eosphoros-ai/DB-GPT repository, addressing a persistent data hygiene issue in knowledge space management. He engineered a targeted bug fix in Python that explicitly removes the entire directory associated with a deleted knowledge space, ensuring no residual files remain and eliminating data persistence gaps. This approach improved file management by preventing orphaned files and storage inconsistencies, aligning system behavior with user expectations. Tiger validated the solution with updated tests to cover edge cases, demonstrating careful attention to long-term reliability and low-risk deployment. His work reflects depth in backend development and bug fixing.